Feeling sick after hard training.

Hey guys, first post.

I'm about to start at an MMA gym in the next few days after having about 3 years of no exercise. My weight is back up to 105kg (should be around 85-90kg). I had previously done BJJ for about 7 months and I remember those first few weeks and how sick I felt after training hard.

I always kept well hydrated and didn't eat anything to close to the session. Is there anything else I should be doing to avoid the dizzy sick feeling or is that just part of the deal when you start training again.

Excess heat, or poor breathing habits (which lead to excess heat) could be the culprit.

Take steps to actively cool, especially when the room temperature is warmer. Keeping a cool (not cold) towel nearby or running cool water over your wrists every so often, on the back of your neck, and the top of your head works wonders.

I usually find the issue when I start feeling shitty is heat. Its sometimes a problem, especially when you are training with old school instructors who liken suffering in the heat to some sort of toughening routine. I make a point to tell them I have had heat exhaustion several times in the past so I have to be careful and they are usually understanding.

W. Rabbit's tips on keeping cool are good... in fact I am going to use them as well.

I hate training in extreme heat too..in this day and age, people should realize there are limits to what you should put yourself through in this regard.
Frequent water breaks are not going to make you a wimp.

" If one wants to have a friend one must also want to wage war for him: and to wage war one must be capable of being an enemy." - Fr. Nietzsche 'On The Friend' Thus Spake Zarathustra

I hate training in extreme heat too..in this day and age, people should realize there are limits to what you should put yourself through in this regard.
Frequent water breaks are not going to make you a wimp.

My first instructor made me promise not to barf on his mats. It was pretty much a license to say "forget this, I need a break".